Fuel-oil burner



Feb, 25, 1930. J. MAY 1,748,611

y FUEL OIL BURNER Filed ot. 22, 192e.

Figi

`IN V EN TOR,

A TTORNEZ `Patented Feb. 25, 1936 rica 'CALEB J. MAY, or' BELLINGHAM, wasrrrNe-roiv, Aas-SIGNOR or ONE-FOURTH EACH To CHARLES IB. MAY, .'{VAN .'D. WASHINGTON lJlAY, AND `JAIVIIIS W. BUTTON, ALLOE :SELLING-HAM,

FUEL-OIL Birmanial y Application vfiled October 22, 1928. Serial No. 313,996. y

My invention relates to improvements in fueloil burners, more especially intended for kitchen ranges and house furnaces, and has for an object to provide a. burner suited to L use fuel oil in which there are no moving parts and combustion proceeds on downwardlower step 8 of spider legs 7 with riser a8 extended therethrough. Combustion ring 15 vis smaller than ring 15 and bears on step'9 lwith riser a9 extended therethrough. Combustion ring 17 is smaller than ring 16 and '-is placed to bear on stepV 10 with riser 4L10 'Y extended therethrough.

ly inclined surface of small declivity.

Another object of my improvement is to provide for said combustion under the action of distributed down-draft air.

Another object of my improvement is to 'provide for said combustion-on surfaces in superposed relation each successive surface adapted to receive the unconsumed fuel from preferably in the surface of a cone parallel =with spider arms 7. The upper surface of j each of rings 15, 16 and 17 is preferably that of a flat vtruncated c one,land ythe lower sur- 'faces thereof,a15, L16 and L17 arefprefer- Aably concave asv shown to cause oil flowing the surface neXt above.

,Another object of myv improvement is to provide against the spreading of liquid fuel over surfaces where its presence wouldbe undesirable.

Further objects of my improvements will vappear as the description proceeds.

l attain theseand other objects of my improvement with the device illustrated in the v to engage in a tapped central hole in the accompanying' sheet of drawings which form a part of 'this application and in which Fig- Y ure 1 is a plan view of my burner, Fig. 2 is a side elevation of the burner in place in the y lire pot of akitchen range in section on a longitudinal medial plane and Fig. 3 is a 39 plan view of one of the combustion' rings.

Similar characters indicate similar parts throughout.

Certain parts are broken away to show others hidden thereby.

VVith more particular reference to the designated parts: A frame 4 has side walls and a rear end wall on which bears cover 5 preferably rabbeted to engage frame walls 4 from which'it is removable. lValls 4l together with cover 5 constitute a bottomless box with one open end. h

Cover 5 has central hole 6 therethrough to the margin of which is fastened conical spider H 7 preferably having three legsinclined vdiagonally upward and meeting in central hub Spider arms or legs 7 have spaced horizontal steps 8, 9 and 107 and risers a8, a9 and @10. Annular margin 11 around the upper end of hole 6- is on a lower level than the top surface of cover 5 and is surrounded by annular ygroove 12. Annularmargin 14 around the` lower end of hole 6 is reduced to theV dimensions of a lip by annular groove 13 around the same. f

Combustion ring 15 is adapted to bear on The peripheries of rings 15, 16 and 17 are ,i

from combustion ring to-ocmbustion ring to Yleave the same at the periphery thereof.k

Conical nozzle 18 has threaded central hub upper end of spider hub a7. The under side of the base of nozzle 18 ispreferably'concave around hub 19 to ycause oil flowing over the Anozzle to leave the saine at the periphery of vits base; through nozzle 18 and registers with hole 67.

Axial hole k20 extends entirely Central boss Z918 projects from the vertex of the nozzle and hole 20 is continued there-A through and its outer vend is tapped to engage screw 22 which stops said'hole' at its upper end. f Holes 21, three of which are' shown -inFig- 2; are preferablyfour in number andare spaced-around the uinction of the ynozzle and boss 518. Theseholes provide Vshaped bottom from the lowest part of which fire box thereof. Preferably bricks 33 areV used to occupy the grate space around burner box 4.

1n operation: Needle valve 25 is opened by turning handle 27 thereof. Fuel oil flows from nozzle outlets 21 on to the surface of the nozzle where it is ignited. The oil not consumed on said nozzle flows downward on to ring 17 to which the combustion is Coirmunicated. Oil not burned on ring 17 flows down on to ring 16 where said combustion is communicated, and such oil as is not consumed on ring 16 passes on to ring 15 where, it is assumed, the residue of all that is flowing through' outlets 21 will be consumed. However, any surplus not consumed on the lowest combustion ring will dip down into groove 12 at which place the combustion will continue to consume it. And. if such a quantity of oil is flowing from said nozzle outlets that groove 12 becomes filled with oil, then it flows over margin 11 down over the walls of hole 6 from which it drips into pan 28 to pass out therefrom thro-ugh pipe 29 intov a receptacle as above stated.

The burner is operating at full capacity when oil is burning on the surface of bottom ring l5, and only an excessive opening of valve 25 will provide a surplus to flow into drip pan 28.

Heat from the oil burning on the rings will cause a movement of air through the openings of grate 32 into box 4 and thence through holeG and upward through spaces 30 between said rings and between the lower ring and cover 5 and also between the top ring and nozzle 18. The movement of this air current will be quite strong and as it impinges on concave surfaces w15, @16, L17 and L18 it will be deflected and provide a down draft of considerable force on top of the sheets of fiame on'said rings and on the cover, if oil is provided for groove 12. These rings become very hot and the sheets of oil thereon .are thin allowing very complete oxidization of the oil and gases generated therefrom and causing' Yintense heat of combustion.

Having thus disclosed my invention, what 1 claim as new therein and desire to secure by Letters Patent is,-

An oil burner consisting of a base, a. threelegged spider mounted on said base projectingr upward therefrom having spaced sets of frusto conical annular disc mounted on each of said sets of steps, a liquid fuel nozzle mounted centrally above the topmost of said discs having outlets to deliver liquid fuel on the upper surface of said topmost disc, a pipe connected to said nozzle outlets, and a controlable valve in said pipe.

CALEB J. MAY.

.steps on the outer surfaces ofV said legs, aV 

